Journal
MINERALS
Volume 12, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/min12020170
Keywords
biological apatite; hydroxyapatite; carbonate apatite; human tooth enamel; bone
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The purpose of this article is to prevent further confusion regarding the naming of biological apatite and provide a clear definition. According to the International Mineralogical Association, biological apatite is a carbonated hydroxyapatite, which is distinct from carbonate apatite. The authors hope that this defined classification will be widely adopted in various research and applied fields to eliminate confusion.
Biological apatite in enamel, dentin, cementum, and bone is highly individualized hydroxyapatite with high tissue dependency. Often, standard and average textbook values for biological apatite do not apply to actual subjects, and the reported results of analyses differ among investigators. In particular, the term biological apatite is often confusingly and incorrectly used to describe carbonate apatite. The purpose of this review is to prevent further confusion. We believe that apatite should be well understood across disciplines and the terminology clearly defined. According to a definition by the International Mineralogical Association's Commission on New Minerals Nomenclature and Classification, biological apatite formed by living organisms is a type of hydroxyapatite. More specifically, it is carbonated hydroxyapatite, which is quite different from frequently misnamed carbonate apatite. We hope that this definition will be widely adopted to remove confusion around the naming of apatite in many research and applied fields.
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